chrono/
time_delta.rs

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1// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
2// file at the top-level directory of this distribution and at
3// http://rust-lang.org/COPYRIGHT.
4//
5// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8// option. This file may not be copied, modified, or distributed
9// except according to those terms.
10
11//! Temporal quantification
12
13use core::ops::{Add, AddAssign, Div, Mul, Neg, Sub, SubAssign};
14use core::time::Duration;
15use core::{fmt, i64};
16#[cfg(feature = "std")]
17use std::error::Error;
18
19use crate::{expect, try_opt};
20
21#[cfg(any(feature = "rkyv", feature = "rkyv-16", feature = "rkyv-32", feature = "rkyv-64"))]
22use rkyv::{Archive, Deserialize, Serialize};
23
24/// The number of nanoseconds in a microsecond.
25const NANOS_PER_MICRO: i32 = 1000;
26/// The number of nanoseconds in a millisecond.
27const NANOS_PER_MILLI: i32 = 1_000_000;
28/// The number of nanoseconds in seconds.
29pub(crate) const NANOS_PER_SEC: i32 = 1_000_000_000;
30/// The number of microseconds per second.
31const MICROS_PER_SEC: i64 = 1_000_000;
32/// The number of milliseconds per second.
33const MILLIS_PER_SEC: i64 = 1000;
34/// The number of seconds in a minute.
35const SECS_PER_MINUTE: i64 = 60;
36/// The number of seconds in an hour.
37const SECS_PER_HOUR: i64 = 3600;
38/// The number of (non-leap) seconds in days.
39const SECS_PER_DAY: i64 = 86_400;
40/// The number of (non-leap) seconds in a week.
41const SECS_PER_WEEK: i64 = 604_800;
42
43/// Time duration with nanosecond precision.
44///
45/// This also allows for negative durations; see individual methods for details.
46///
47/// A `TimeDelta` is represented internally as a complement of seconds and
48/// nanoseconds. The range is restricted to that of `i64` milliseconds, with the
49/// minimum value notably being set to `-i64::MAX` rather than allowing the full
50/// range of `i64::MIN`. This is to allow easy flipping of sign, so that for
51/// instance `abs()` can be called without any checks.
52#[derive(Clone, Copy, Default, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
53#[cfg_attr(
54    any(feature = "rkyv", feature = "rkyv-16", feature = "rkyv-32", feature = "rkyv-64"),
55    derive(Archive, Deserialize, Serialize),
56    archive(compare(PartialEq, PartialOrd)),
57    archive_attr(derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Debug, Hash))
58)]
59#[cfg_attr(feature = "rkyv-validation", archive(check_bytes))]
60pub struct TimeDelta {
61    secs: i64,
62    nanos: i32, // Always 0 <= nanos < NANOS_PER_SEC
63}
64
65/// The minimum possible `TimeDelta`: `-i64::MAX` milliseconds.
66pub(crate) const MIN: TimeDelta = TimeDelta {
67    secs: -i64::MAX / MILLIS_PER_SEC - 1,
68    nanos: NANOS_PER_SEC + (-i64::MAX % MILLIS_PER_SEC) as i32 * NANOS_PER_MILLI,
69};
70
71/// The maximum possible `TimeDelta`: `i64::MAX` milliseconds.
72pub(crate) const MAX: TimeDelta = TimeDelta {
73    secs: i64::MAX / MILLIS_PER_SEC,
74    nanos: (i64::MAX % MILLIS_PER_SEC) as i32 * NANOS_PER_MILLI,
75};
76
77impl TimeDelta {
78    /// Makes a new `TimeDelta` with given number of seconds and nanoseconds.
79    ///
80    /// # Errors
81    ///
82    /// Returns `None` when the duration is out of bounds, or if `nanos` ≥ 1,000,000,000.
83    pub const fn new(secs: i64, nanos: u32) -> Option<TimeDelta> {
84        if secs < MIN.secs
85            || secs > MAX.secs
86            || nanos >= 1_000_000_000
87            || (secs == MAX.secs && nanos > MAX.nanos as u32)
88            || (secs == MIN.secs && nanos < MIN.nanos as u32)
89        {
90            return None;
91        }
92        Some(TimeDelta { secs, nanos: nanos as i32 })
93    }
94
95    /// Makes a new `TimeDelta` with the given number of weeks.
96    ///
97    /// Equivalent to `TimeDelta::seconds(weeks * 7 * 24 * 60 * 60)` with
98    /// overflow checks.
99    ///
100    /// # Panics
101    ///
102    /// Panics when the duration is out of bounds.
103    #[inline]
104    #[must_use]
105    pub const fn weeks(weeks: i64) -> TimeDelta {
106        expect!(TimeDelta::try_weeks(weeks), "TimeDelta::weeks out of bounds")
107    }
108
109    /// Makes a new `TimeDelta` with the given number of weeks.
110    ///
111    /// Equivalent to `TimeDelta::seconds(weeks * 7 * 24 * 60 * 60)` with
112    /// overflow checks.
113    ///
114    /// # Errors
115    ///
116    /// Returns `None` when the `TimeDelta` would be out of bounds.
117    #[inline]
118    pub const fn try_weeks(weeks: i64) -> Option<TimeDelta> {
119        TimeDelta::try_seconds(try_opt!(weeks.checked_mul(SECS_PER_WEEK)))
120    }
121
122    /// Makes a new `TimeDelta` with the given number of days.
123    ///
124    /// Equivalent to `TimeDelta::seconds(days * 24 * 60 * 60)` with overflow
125    /// checks.
126    ///
127    /// # Panics
128    ///
129    /// Panics when the `TimeDelta` would be out of bounds.
130    #[inline]
131    #[must_use]
132    pub const fn days(days: i64) -> TimeDelta {
133        expect!(TimeDelta::try_days(days), "TimeDelta::days out of bounds")
134    }
135
136    /// Makes a new `TimeDelta` with the given number of days.
137    ///
138    /// Equivalent to `TimeDelta::seconds(days * 24 * 60 * 60)` with overflow
139    /// checks.
140    ///
141    /// # Errors
142    ///
143    /// Returns `None` when the `TimeDelta` would be out of bounds.
144    #[inline]
145    pub const fn try_days(days: i64) -> Option<TimeDelta> {
146        TimeDelta::try_seconds(try_opt!(days.checked_mul(SECS_PER_DAY)))
147    }
148
149    /// Makes a new `TimeDelta` with the given number of hours.
150    ///
151    /// Equivalent to `TimeDelta::seconds(hours * 60 * 60)` with overflow checks.
152    ///
153    /// # Panics
154    ///
155    /// Panics when the `TimeDelta` would be out of bounds.
156    #[inline]
157    #[must_use]
158    pub const fn hours(hours: i64) -> TimeDelta {
159        expect!(TimeDelta::try_hours(hours), "TimeDelta::hours out of bounds")
160    }
161
162    /// Makes a new `TimeDelta` with the given number of hours.
163    ///
164    /// Equivalent to `TimeDelta::seconds(hours * 60 * 60)` with overflow checks.
165    ///
166    /// # Errors
167    ///
168    /// Returns `None` when the `TimeDelta` would be out of bounds.
169    #[inline]
170    pub const fn try_hours(hours: i64) -> Option<TimeDelta> {
171        TimeDelta::try_seconds(try_opt!(hours.checked_mul(SECS_PER_HOUR)))
172    }
173
174    /// Makes a new `TimeDelta` with the given number of minutes.
175    ///
176    /// Equivalent to `TimeDelta::seconds(minutes * 60)` with overflow checks.
177    ///
178    /// # Panics
179    ///
180    /// Panics when the `TimeDelta` would be out of bounds.
181    #[inline]
182    #[must_use]
183    pub const fn minutes(minutes: i64) -> TimeDelta {
184        expect!(TimeDelta::try_minutes(minutes), "TimeDelta::minutes out of bounds")
185    }
186
187    /// Makes a new `TimeDelta` with the given number of minutes.
188    ///
189    /// Equivalent to `TimeDelta::seconds(minutes * 60)` with overflow checks.
190    ///
191    /// # Errors
192    ///
193    /// Returns `None` when the `TimeDelta` would be out of bounds.
194    #[inline]
195    pub const fn try_minutes(minutes: i64) -> Option<TimeDelta> {
196        TimeDelta::try_seconds(try_opt!(minutes.checked_mul(SECS_PER_MINUTE)))
197    }
198
199    /// Makes a new `TimeDelta` with the given number of seconds.
200    ///
201    /// # Panics
202    ///
203    /// Panics when `seconds` is more than `i64::MAX / 1_000` or less than `-i64::MAX / 1_000`
204    /// (in this context, this is the same as `i64::MIN / 1_000` due to rounding).
205    #[inline]
206    #[must_use]
207    pub const fn seconds(seconds: i64) -> TimeDelta {
208        expect!(TimeDelta::try_seconds(seconds), "TimeDelta::seconds out of bounds")
209    }
210
211    /// Makes a new `TimeDelta` with the given number of seconds.
212    ///
213    /// # Errors
214    ///
215    /// Returns `None` when `seconds` is more than `i64::MAX / 1_000` or less than
216    /// `-i64::MAX / 1_000` (in this context, this is the same as `i64::MIN / 1_000` due to
217    /// rounding).
218    #[inline]
219    pub const fn try_seconds(seconds: i64) -> Option<TimeDelta> {
220        TimeDelta::new(seconds, 0)
221    }
222
223    /// Makes a new `TimeDelta` with the given number of milliseconds.
224    ///
225    /// # Panics
226    ///
227    /// Panics when the `TimeDelta` would be out of bounds, i.e. when `milliseconds` is more than
228    /// `i64::MAX` or less than `-i64::MAX`. Notably, this is not the same as `i64::MIN`.
229    #[inline]
230    pub const fn milliseconds(milliseconds: i64) -> TimeDelta {
231        expect!(TimeDelta::try_milliseconds(milliseconds), "TimeDelta::milliseconds out of bounds")
232    }
233
234    /// Makes a new `TimeDelta` with the given number of milliseconds.
235    ///
236    /// # Errors
237    ///
238    /// Returns `None` the `TimeDelta` would be out of bounds, i.e. when `milliseconds` is more
239    /// than `i64::MAX` or less than `-i64::MAX`. Notably, this is not the same as `i64::MIN`.
240    #[inline]
241    pub const fn try_milliseconds(milliseconds: i64) -> Option<TimeDelta> {
242        // We don't need to compare against MAX, as this function accepts an
243        // i64, and MAX is aligned to i64::MAX milliseconds.
244        if milliseconds < -i64::MAX {
245            return None;
246        }
247        let (secs, millis) = div_mod_floor_64(milliseconds, MILLIS_PER_SEC);
248        let d = TimeDelta { secs, nanos: millis as i32 * NANOS_PER_MILLI };
249        Some(d)
250    }
251
252    /// Makes a new `TimeDelta` with the given number of microseconds.
253    ///
254    /// The number of microseconds acceptable by this constructor is less than
255    /// the total number that can actually be stored in a `TimeDelta`, so it is
256    /// not possible to specify a value that would be out of bounds. This
257    /// function is therefore infallible.
258    #[inline]
259    pub const fn microseconds(microseconds: i64) -> TimeDelta {
260        let (secs, micros) = div_mod_floor_64(microseconds, MICROS_PER_SEC);
261        let nanos = micros as i32 * NANOS_PER_MICRO;
262        TimeDelta { secs, nanos }
263    }
264
265    /// Makes a new `TimeDelta` with the given number of nanoseconds.
266    ///
267    /// The number of nanoseconds acceptable by this constructor is less than
268    /// the total number that can actually be stored in a `TimeDelta`, so it is
269    /// not possible to specify a value that would be out of bounds. This
270    /// function is therefore infallible.
271    #[inline]
272    pub const fn nanoseconds(nanos: i64) -> TimeDelta {
273        let (secs, nanos) = div_mod_floor_64(nanos, NANOS_PER_SEC as i64);
274        TimeDelta { secs, nanos: nanos as i32 }
275    }
276
277    /// Returns the total number of whole weeks in the `TimeDelta`.
278    #[inline]
279    pub const fn num_weeks(&self) -> i64 {
280        self.num_days() / 7
281    }
282
283    /// Returns the total number of whole days in the `TimeDelta`.
284    pub const fn num_days(&self) -> i64 {
285        self.num_seconds() / SECS_PER_DAY
286    }
287
288    /// Returns the total number of whole hours in the `TimeDelta`.
289    #[inline]
290    pub const fn num_hours(&self) -> i64 {
291        self.num_seconds() / SECS_PER_HOUR
292    }
293
294    /// Returns the total number of whole minutes in the `TimeDelta`.
295    #[inline]
296    pub const fn num_minutes(&self) -> i64 {
297        self.num_seconds() / SECS_PER_MINUTE
298    }
299
300    /// Returns the total number of whole seconds in the `TimeDelta`.
301    pub const fn num_seconds(&self) -> i64 {
302        // If secs is negative, nanos should be subtracted from the duration.
303        if self.secs < 0 && self.nanos > 0 {
304            self.secs + 1
305        } else {
306            self.secs
307        }
308    }
309
310    /// Returns the number of nanoseconds such that
311    /// `subsec_nanos() + num_seconds() * NANOS_PER_SEC` is the total number of
312    /// nanoseconds in the `TimeDelta`.
313    pub const fn subsec_nanos(&self) -> i32 {
314        if self.secs < 0 && self.nanos > 0 {
315            self.nanos - NANOS_PER_SEC
316        } else {
317            self.nanos
318        }
319    }
320
321    /// Returns the total number of whole milliseconds in the `TimeDelta`.
322    pub const fn num_milliseconds(&self) -> i64 {
323        // A proper TimeDelta will not overflow, because MIN and MAX are defined such
324        // that the range is within the bounds of an i64, from -i64::MAX through to
325        // +i64::MAX inclusive. Notably, i64::MIN is excluded from this range.
326        let secs_part = self.num_seconds() * MILLIS_PER_SEC;
327        let nanos_part = self.subsec_nanos() / NANOS_PER_MILLI;
328        secs_part + nanos_part as i64
329    }
330
331    /// Returns the total number of whole microseconds in the `TimeDelta`,
332    /// or `None` on overflow (exceeding 2^63 microseconds in either direction).
333    pub const fn num_microseconds(&self) -> Option<i64> {
334        let secs_part = try_opt!(self.num_seconds().checked_mul(MICROS_PER_SEC));
335        let nanos_part = self.subsec_nanos() / NANOS_PER_MICRO;
336        secs_part.checked_add(nanos_part as i64)
337    }
338
339    /// Returns the total number of whole nanoseconds in the `TimeDelta`,
340    /// or `None` on overflow (exceeding 2^63 nanoseconds in either direction).
341    pub const fn num_nanoseconds(&self) -> Option<i64> {
342        let secs_part = try_opt!(self.num_seconds().checked_mul(NANOS_PER_SEC as i64));
343        let nanos_part = self.subsec_nanos();
344        secs_part.checked_add(nanos_part as i64)
345    }
346
347    /// Add two `TimeDelta`s, returning `None` if overflow occurred.
348    #[must_use]
349    pub const fn checked_add(&self, rhs: &TimeDelta) -> Option<TimeDelta> {
350        // No overflow checks here because we stay comfortably within the range of an `i64`.
351        // Range checks happen in `TimeDelta::new`.
352        let mut secs = self.secs + rhs.secs;
353        let mut nanos = self.nanos + rhs.nanos;
354        if nanos >= NANOS_PER_SEC {
355            nanos -= NANOS_PER_SEC;
356            secs += 1;
357        }
358        TimeDelta::new(secs, nanos as u32)
359    }
360
361    /// Subtract two `TimeDelta`s, returning `None` if overflow occurred.
362    #[must_use]
363    pub const fn checked_sub(&self, rhs: &TimeDelta) -> Option<TimeDelta> {
364        // No overflow checks here because we stay comfortably within the range of an `i64`.
365        // Range checks happen in `TimeDelta::new`.
366        let mut secs = self.secs - rhs.secs;
367        let mut nanos = self.nanos - rhs.nanos;
368        if nanos < 0 {
369            nanos += NANOS_PER_SEC;
370            secs -= 1;
371        }
372        TimeDelta::new(secs, nanos as u32)
373    }
374
375    /// Returns the `TimeDelta` as an absolute (non-negative) value.
376    #[inline]
377    pub const fn abs(&self) -> TimeDelta {
378        if self.secs < 0 && self.nanos != 0 {
379            TimeDelta { secs: (self.secs + 1).abs(), nanos: NANOS_PER_SEC - self.nanos }
380        } else {
381            TimeDelta { secs: self.secs.abs(), nanos: self.nanos }
382        }
383    }
384
385    /// The minimum possible `TimeDelta`: `-i64::MAX` milliseconds.
386    #[inline]
387    pub const fn min_value() -> TimeDelta {
388        MIN
389    }
390
391    /// The maximum possible `TimeDelta`: `i64::MAX` milliseconds.
392    #[inline]
393    pub const fn max_value() -> TimeDelta {
394        MAX
395    }
396
397    /// A `TimeDelta` where the stored seconds and nanoseconds are equal to zero.
398    #[inline]
399    pub const fn zero() -> TimeDelta {
400        TimeDelta { secs: 0, nanos: 0 }
401    }
402
403    /// Returns `true` if the `TimeDelta` equals `TimeDelta::zero()`.
404    #[inline]
405    pub const fn is_zero(&self) -> bool {
406        self.secs == 0 && self.nanos == 0
407    }
408
409    /// Creates a `TimeDelta` object from `std::time::Duration`
410    ///
411    /// This function errors when original duration is larger than the maximum
412    /// value supported for this type.
413    pub const fn from_std(duration: Duration) -> Result<TimeDelta, OutOfRangeError> {
414        // We need to check secs as u64 before coercing to i64
415        if duration.as_secs() > MAX.secs as u64 {
416            return Err(OutOfRangeError(()));
417        }
418        match TimeDelta::new(duration.as_secs() as i64, duration.subsec_nanos()) {
419            Some(d) => Ok(d),
420            None => Err(OutOfRangeError(())),
421        }
422    }
423
424    /// Creates a `std::time::Duration` object from a `TimeDelta`.
425    ///
426    /// This function errors when duration is less than zero. As standard
427    /// library implementation is limited to non-negative values.
428    pub const fn to_std(&self) -> Result<Duration, OutOfRangeError> {
429        if self.secs < 0 {
430            return Err(OutOfRangeError(()));
431        }
432        Ok(Duration::new(self.secs as u64, self.nanos as u32))
433    }
434
435    /// This duplicates `Neg::neg` because trait methods can't be const yet.
436    pub(crate) const fn neg(self) -> TimeDelta {
437        let (secs_diff, nanos) = match self.nanos {
438            0 => (0, 0),
439            nanos => (1, NANOS_PER_SEC - nanos),
440        };
441        TimeDelta { secs: -self.secs - secs_diff, nanos }
442    }
443}
444
445impl Neg for TimeDelta {
446    type Output = TimeDelta;
447
448    #[inline]
449    fn neg(self) -> TimeDelta {
450        let (secs_diff, nanos) = match self.nanos {
451            0 => (0, 0),
452            nanos => (1, NANOS_PER_SEC - nanos),
453        };
454        TimeDelta { secs: -self.secs - secs_diff, nanos }
455    }
456}
457
458impl Add for TimeDelta {
459    type Output = TimeDelta;
460
461    fn add(self, rhs: TimeDelta) -> TimeDelta {
462        self.checked_add(&rhs).expect("`TimeDelta + TimeDelta` overflowed")
463    }
464}
465
466impl Sub for TimeDelta {
467    type Output = TimeDelta;
468
469    fn sub(self, rhs: TimeDelta) -> TimeDelta {
470        self.checked_sub(&rhs).expect("`TimeDelta - TimeDelta` overflowed")
471    }
472}
473
474impl AddAssign for TimeDelta {
475    fn add_assign(&mut self, rhs: TimeDelta) {
476        let new = self.checked_add(&rhs).expect("`TimeDelta + TimeDelta` overflowed");
477        *self = new;
478    }
479}
480
481impl SubAssign for TimeDelta {
482    fn sub_assign(&mut self, rhs: TimeDelta) {
483        let new = self.checked_sub(&rhs).expect("`TimeDelta - TimeDelta` overflowed");
484        *self = new;
485    }
486}
487
488impl Mul<i32> for TimeDelta {
489    type Output = TimeDelta;
490
491    fn mul(self, rhs: i32) -> TimeDelta {
492        // Multiply nanoseconds as i64, because it cannot overflow that way.
493        let total_nanos = self.nanos as i64 * rhs as i64;
494        let (extra_secs, nanos) = div_mod_floor_64(total_nanos, NANOS_PER_SEC as i64);
495        let secs = self.secs * rhs as i64 + extra_secs;
496        TimeDelta { secs, nanos: nanos as i32 }
497    }
498}
499
500impl Div<i32> for TimeDelta {
501    type Output = TimeDelta;
502
503    fn div(self, rhs: i32) -> TimeDelta {
504        let mut secs = self.secs / rhs as i64;
505        let carry = self.secs - secs * rhs as i64;
506        let extra_nanos = carry * NANOS_PER_SEC as i64 / rhs as i64;
507        let mut nanos = self.nanos / rhs + extra_nanos as i32;
508        if nanos >= NANOS_PER_SEC {
509            nanos -= NANOS_PER_SEC;
510            secs += 1;
511        }
512        if nanos < 0 {
513            nanos += NANOS_PER_SEC;
514            secs -= 1;
515        }
516        TimeDelta { secs, nanos }
517    }
518}
519
520impl<'a> core::iter::Sum<&'a TimeDelta> for TimeDelta {
521    fn sum<I: Iterator<Item = &'a TimeDelta>>(iter: I) -> TimeDelta {
522        iter.fold(TimeDelta::zero(), |acc, x| acc + *x)
523    }
524}
525
526impl core::iter::Sum<TimeDelta> for TimeDelta {
527    fn sum<I: Iterator<Item = TimeDelta>>(iter: I) -> TimeDelta {
528        iter.fold(TimeDelta::zero(), |acc, x| acc + x)
529    }
530}
531
532impl fmt::Display for TimeDelta {
533    /// Format a `TimeDelta` using the [ISO 8601] format
534    ///
535    /// [ISO 8601]: https://en.wikipedia.org/wiki/ISO_8601#Durations
536    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
537        // technically speaking, negative duration is not valid ISO 8601,
538        // but we need to print it anyway.
539        let (abs, sign) = if self.secs < 0 { (-*self, "-") } else { (*self, "") };
540
541        write!(f, "{}P", sign)?;
542        // Plenty of ways to encode an empty string. `P0D` is short and not too strange.
543        if abs.secs == 0 && abs.nanos == 0 {
544            return f.write_str("0D");
545        }
546
547        f.write_fmt(format_args!("T{}", abs.secs))?;
548
549        if abs.nanos > 0 {
550            // Count the number of significant digits, while removing all trailing zero's.
551            let mut figures = 9usize;
552            let mut fraction_digits = abs.nanos;
553            loop {
554                let div = fraction_digits / 10;
555                let last_digit = fraction_digits % 10;
556                if last_digit != 0 {
557                    break;
558                }
559                fraction_digits = div;
560                figures -= 1;
561            }
562            f.write_fmt(format_args!(".{:01$}", fraction_digits, figures))?;
563        }
564        f.write_str("S")?;
565        Ok(())
566    }
567}
568
569/// Represents error when converting `TimeDelta` to/from a standard library
570/// implementation
571///
572/// The `std::time::Duration` supports a range from zero to `u64::MAX`
573/// *seconds*, while this module supports signed range of up to
574/// `i64::MAX` of *milliseconds*.
575#[derive(Debug, Clone, Copy, PartialEq, Eq)]
576pub struct OutOfRangeError(());
577
578impl fmt::Display for OutOfRangeError {
579    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
580        write!(f, "Source duration value is out of range for the target type")
581    }
582}
583
584#[cfg(feature = "std")]
585impl Error for OutOfRangeError {
586    #[allow(deprecated)]
587    fn description(&self) -> &str {
588        "out of range error"
589    }
590}
591
592#[inline]
593const fn div_mod_floor_64(this: i64, other: i64) -> (i64, i64) {
594    (this.div_euclid(other), this.rem_euclid(other))
595}
596
597#[cfg(all(feature = "arbitrary", feature = "std"))]
598impl arbitrary::Arbitrary<'_> for TimeDelta {
599    fn arbitrary(u: &mut arbitrary::Unstructured) -> arbitrary::Result<TimeDelta> {
600        const MIN_SECS: i64 = -i64::MAX / MILLIS_PER_SEC - 1;
601        const MAX_SECS: i64 = i64::MAX / MILLIS_PER_SEC;
602
603        let secs: i64 = u.int_in_range(MIN_SECS..=MAX_SECS)?;
604        let nanos: i32 = u.int_in_range(0..=(NANOS_PER_SEC - 1))?;
605        let duration = TimeDelta { secs, nanos };
606
607        if duration < MIN || duration > MAX {
608            Err(arbitrary::Error::IncorrectFormat)
609        } else {
610            Ok(duration)
611        }
612    }
613}
614
615#[cfg(test)]
616mod tests {
617    use super::OutOfRangeError;
618    use super::{TimeDelta, MAX, MIN};
619    use core::time::Duration;
620
621    #[test]
622    fn test_duration() {
623        assert!(TimeDelta::seconds(1) != TimeDelta::zero());
624        assert_eq!(TimeDelta::seconds(1) + TimeDelta::seconds(2), TimeDelta::seconds(3));
625        assert_eq!(
626            TimeDelta::seconds(86_399) + TimeDelta::seconds(4),
627            TimeDelta::days(1) + TimeDelta::seconds(3)
628        );
629        assert_eq!(TimeDelta::days(10) - TimeDelta::seconds(1000), TimeDelta::seconds(863_000));
630        assert_eq!(
631            TimeDelta::days(10) - TimeDelta::seconds(1_000_000),
632            TimeDelta::seconds(-136_000)
633        );
634        assert_eq!(
635            TimeDelta::days(2) + TimeDelta::seconds(86_399) + TimeDelta::nanoseconds(1_234_567_890),
636            TimeDelta::days(3) + TimeDelta::nanoseconds(234_567_890)
637        );
638        assert_eq!(-TimeDelta::days(3), TimeDelta::days(-3));
639        assert_eq!(
640            -(TimeDelta::days(3) + TimeDelta::seconds(70)),
641            TimeDelta::days(-4) + TimeDelta::seconds(86_400 - 70)
642        );
643
644        let mut d = TimeDelta::default();
645        d += TimeDelta::minutes(1);
646        d -= TimeDelta::seconds(30);
647        assert_eq!(d, TimeDelta::seconds(30));
648    }
649
650    #[test]
651    fn test_duration_num_days() {
652        assert_eq!(TimeDelta::zero().num_days(), 0);
653        assert_eq!(TimeDelta::days(1).num_days(), 1);
654        assert_eq!(TimeDelta::days(-1).num_days(), -1);
655        assert_eq!(TimeDelta::seconds(86_399).num_days(), 0);
656        assert_eq!(TimeDelta::seconds(86_401).num_days(), 1);
657        assert_eq!(TimeDelta::seconds(-86_399).num_days(), 0);
658        assert_eq!(TimeDelta::seconds(-86_401).num_days(), -1);
659        assert_eq!(TimeDelta::days(i32::MAX as i64).num_days(), i32::MAX as i64);
660        assert_eq!(TimeDelta::days(i32::MIN as i64).num_days(), i32::MIN as i64);
661    }
662
663    #[test]
664    fn test_duration_num_seconds() {
665        assert_eq!(TimeDelta::zero().num_seconds(), 0);
666        assert_eq!(TimeDelta::seconds(1).num_seconds(), 1);
667        assert_eq!(TimeDelta::seconds(-1).num_seconds(), -1);
668        assert_eq!(TimeDelta::milliseconds(999).num_seconds(), 0);
669        assert_eq!(TimeDelta::milliseconds(1001).num_seconds(), 1);
670        assert_eq!(TimeDelta::milliseconds(-999).num_seconds(), 0);
671        assert_eq!(TimeDelta::milliseconds(-1001).num_seconds(), -1);
672    }
673    #[test]
674    fn test_duration_seconds_max_allowed() {
675        let duration = TimeDelta::seconds(i64::MAX / 1_000);
676        assert_eq!(duration.num_seconds(), i64::MAX / 1_000);
677        assert_eq!(
678            duration.secs as i128 * 1_000_000_000 + duration.nanos as i128,
679            i64::MAX as i128 / 1_000 * 1_000_000_000
680        );
681    }
682    #[test]
683    fn test_duration_seconds_max_overflow() {
684        assert!(TimeDelta::try_seconds(i64::MAX / 1_000 + 1).is_none());
685    }
686    #[test]
687    #[should_panic(expected = "TimeDelta::seconds out of bounds")]
688    fn test_duration_seconds_max_overflow_panic() {
689        let _ = TimeDelta::seconds(i64::MAX / 1_000 + 1);
690    }
691    #[test]
692    fn test_duration_seconds_min_allowed() {
693        let duration = TimeDelta::seconds(i64::MIN / 1_000); // Same as -i64::MAX / 1_000 due to rounding
694        assert_eq!(duration.num_seconds(), i64::MIN / 1_000); // Same as -i64::MAX / 1_000 due to rounding
695        assert_eq!(
696            duration.secs as i128 * 1_000_000_000 + duration.nanos as i128,
697            -i64::MAX as i128 / 1_000 * 1_000_000_000
698        );
699    }
700    #[test]
701    fn test_duration_seconds_min_underflow() {
702        assert!(TimeDelta::try_seconds(-i64::MAX / 1_000 - 1).is_none());
703    }
704    #[test]
705    #[should_panic(expected = "TimeDelta::seconds out of bounds")]
706    fn test_duration_seconds_min_underflow_panic() {
707        let _ = TimeDelta::seconds(-i64::MAX / 1_000 - 1);
708    }
709
710    #[test]
711    fn test_duration_num_milliseconds() {
712        assert_eq!(TimeDelta::zero().num_milliseconds(), 0);
713        assert_eq!(TimeDelta::milliseconds(1).num_milliseconds(), 1);
714        assert_eq!(TimeDelta::milliseconds(-1).num_milliseconds(), -1);
715        assert_eq!(TimeDelta::microseconds(999).num_milliseconds(), 0);
716        assert_eq!(TimeDelta::microseconds(1001).num_milliseconds(), 1);
717        assert_eq!(TimeDelta::microseconds(-999).num_milliseconds(), 0);
718        assert_eq!(TimeDelta::microseconds(-1001).num_milliseconds(), -1);
719    }
720    #[test]
721    fn test_duration_milliseconds_max_allowed() {
722        // The maximum number of milliseconds acceptable through the constructor is
723        // equal to the number that can be stored in a TimeDelta.
724        let duration = TimeDelta::milliseconds(i64::MAX);
725        assert_eq!(duration.num_milliseconds(), i64::MAX);
726        assert_eq!(
727            duration.secs as i128 * 1_000_000_000 + duration.nanos as i128,
728            i64::MAX as i128 * 1_000_000
729        );
730    }
731    #[test]
732    fn test_duration_milliseconds_max_overflow() {
733        // Here we ensure that trying to add one millisecond to the maximum storable
734        // value will fail.
735        assert!(TimeDelta::milliseconds(i64::MAX)
736            .checked_add(&TimeDelta::milliseconds(1))
737            .is_none());
738    }
739    #[test]
740    fn test_duration_milliseconds_min_allowed() {
741        // The minimum number of milliseconds acceptable through the constructor is
742        // not equal to the number that can be stored in a TimeDelta - there is a
743        // difference of one (i64::MIN vs -i64::MAX).
744        let duration = TimeDelta::milliseconds(-i64::MAX);
745        assert_eq!(duration.num_milliseconds(), -i64::MAX);
746        assert_eq!(
747            duration.secs as i128 * 1_000_000_000 + duration.nanos as i128,
748            -i64::MAX as i128 * 1_000_000
749        );
750    }
751    #[test]
752    fn test_duration_milliseconds_min_underflow() {
753        // Here we ensure that trying to subtract one millisecond from the minimum
754        // storable value will fail.
755        assert!(TimeDelta::milliseconds(-i64::MAX)
756            .checked_sub(&TimeDelta::milliseconds(1))
757            .is_none());
758    }
759    #[test]
760    #[should_panic(expected = "TimeDelta::milliseconds out of bounds")]
761    fn test_duration_milliseconds_min_underflow_panic() {
762        // Here we ensure that trying to create a value one millisecond below the
763        // minimum storable value will fail. This test is necessary because the
764        // storable range is -i64::MAX, but the constructor type of i64 will allow
765        // i64::MIN, which is one value below.
766        let _ = TimeDelta::milliseconds(i64::MIN); // Same as -i64::MAX - 1
767    }
768
769    #[test]
770    fn test_duration_num_microseconds() {
771        assert_eq!(TimeDelta::zero().num_microseconds(), Some(0));
772        assert_eq!(TimeDelta::microseconds(1).num_microseconds(), Some(1));
773        assert_eq!(TimeDelta::microseconds(-1).num_microseconds(), Some(-1));
774        assert_eq!(TimeDelta::nanoseconds(999).num_microseconds(), Some(0));
775        assert_eq!(TimeDelta::nanoseconds(1001).num_microseconds(), Some(1));
776        assert_eq!(TimeDelta::nanoseconds(-999).num_microseconds(), Some(0));
777        assert_eq!(TimeDelta::nanoseconds(-1001).num_microseconds(), Some(-1));
778
779        // overflow checks
780        const MICROS_PER_DAY: i64 = 86_400_000_000;
781        assert_eq!(
782            TimeDelta::days(i64::MAX / MICROS_PER_DAY).num_microseconds(),
783            Some(i64::MAX / MICROS_PER_DAY * MICROS_PER_DAY)
784        );
785        assert_eq!(
786            TimeDelta::days(-i64::MAX / MICROS_PER_DAY).num_microseconds(),
787            Some(-i64::MAX / MICROS_PER_DAY * MICROS_PER_DAY)
788        );
789        assert_eq!(TimeDelta::days(i64::MAX / MICROS_PER_DAY + 1).num_microseconds(), None);
790        assert_eq!(TimeDelta::days(-i64::MAX / MICROS_PER_DAY - 1).num_microseconds(), None);
791    }
792    #[test]
793    fn test_duration_microseconds_max_allowed() {
794        // The number of microseconds acceptable through the constructor is far
795        // fewer than the number that can actually be stored in a TimeDelta, so this
796        // is not a particular insightful test.
797        let duration = TimeDelta::microseconds(i64::MAX);
798        assert_eq!(duration.num_microseconds(), Some(i64::MAX));
799        assert_eq!(
800            duration.secs as i128 * 1_000_000_000 + duration.nanos as i128,
801            i64::MAX as i128 * 1_000
802        );
803        // Here we create a TimeDelta with the maximum possible number of
804        // microseconds by creating a TimeDelta with the maximum number of
805        // milliseconds and then checking that the number of microseconds matches
806        // the storage limit.
807        let duration = TimeDelta::milliseconds(i64::MAX);
808        assert!(duration.num_microseconds().is_none());
809        assert_eq!(
810            duration.secs as i128 * 1_000_000_000 + duration.nanos as i128,
811            i64::MAX as i128 * 1_000_000
812        );
813    }
814    #[test]
815    fn test_duration_microseconds_max_overflow() {
816        // This test establishes that a TimeDelta can store more microseconds than
817        // are representable through the return of duration.num_microseconds().
818        let duration = TimeDelta::microseconds(i64::MAX) + TimeDelta::microseconds(1);
819        assert!(duration.num_microseconds().is_none());
820        assert_eq!(
821            duration.secs as i128 * 1_000_000_000 + duration.nanos as i128,
822            (i64::MAX as i128 + 1) * 1_000
823        );
824        // Here we ensure that trying to add one microsecond to the maximum storable
825        // value will fail.
826        assert!(TimeDelta::milliseconds(i64::MAX)
827            .checked_add(&TimeDelta::microseconds(1))
828            .is_none());
829    }
830    #[test]
831    fn test_duration_microseconds_min_allowed() {
832        // The number of microseconds acceptable through the constructor is far
833        // fewer than the number that can actually be stored in a TimeDelta, so this
834        // is not a particular insightful test.
835        let duration = TimeDelta::microseconds(i64::MIN);
836        assert_eq!(duration.num_microseconds(), Some(i64::MIN));
837        assert_eq!(
838            duration.secs as i128 * 1_000_000_000 + duration.nanos as i128,
839            i64::MIN as i128 * 1_000
840        );
841        // Here we create a TimeDelta with the minimum possible number of
842        // microseconds by creating a TimeDelta with the minimum number of
843        // milliseconds and then checking that the number of microseconds matches
844        // the storage limit.
845        let duration = TimeDelta::milliseconds(-i64::MAX);
846        assert!(duration.num_microseconds().is_none());
847        assert_eq!(
848            duration.secs as i128 * 1_000_000_000 + duration.nanos as i128,
849            -i64::MAX as i128 * 1_000_000
850        );
851    }
852    #[test]
853    fn test_duration_microseconds_min_underflow() {
854        // This test establishes that a TimeDelta can store more microseconds than
855        // are representable through the return of duration.num_microseconds().
856        let duration = TimeDelta::microseconds(i64::MIN) - TimeDelta::microseconds(1);
857        assert!(duration.num_microseconds().is_none());
858        assert_eq!(
859            duration.secs as i128 * 1_000_000_000 + duration.nanos as i128,
860            (i64::MIN as i128 - 1) * 1_000
861        );
862        // Here we ensure that trying to subtract one microsecond from the minimum
863        // storable value will fail.
864        assert!(TimeDelta::milliseconds(-i64::MAX)
865            .checked_sub(&TimeDelta::microseconds(1))
866            .is_none());
867    }
868
869    #[test]
870    fn test_duration_num_nanoseconds() {
871        assert_eq!(TimeDelta::zero().num_nanoseconds(), Some(0));
872        assert_eq!(TimeDelta::nanoseconds(1).num_nanoseconds(), Some(1));
873        assert_eq!(TimeDelta::nanoseconds(-1).num_nanoseconds(), Some(-1));
874
875        // overflow checks
876        const NANOS_PER_DAY: i64 = 86_400_000_000_000;
877        assert_eq!(
878            TimeDelta::days(i64::MAX / NANOS_PER_DAY).num_nanoseconds(),
879            Some(i64::MAX / NANOS_PER_DAY * NANOS_PER_DAY)
880        );
881        assert_eq!(
882            TimeDelta::days(-i64::MAX / NANOS_PER_DAY).num_nanoseconds(),
883            Some(-i64::MAX / NANOS_PER_DAY * NANOS_PER_DAY)
884        );
885        assert_eq!(TimeDelta::days(i64::MAX / NANOS_PER_DAY + 1).num_nanoseconds(), None);
886        assert_eq!(TimeDelta::days(-i64::MAX / NANOS_PER_DAY - 1).num_nanoseconds(), None);
887    }
888    #[test]
889    fn test_duration_nanoseconds_max_allowed() {
890        // The number of nanoseconds acceptable through the constructor is far fewer
891        // than the number that can actually be stored in a TimeDelta, so this is not
892        // a particular insightful test.
893        let duration = TimeDelta::nanoseconds(i64::MAX);
894        assert_eq!(duration.num_nanoseconds(), Some(i64::MAX));
895        assert_eq!(
896            duration.secs as i128 * 1_000_000_000 + duration.nanos as i128,
897            i64::MAX as i128
898        );
899        // Here we create a TimeDelta with the maximum possible number of nanoseconds
900        // by creating a TimeDelta with the maximum number of milliseconds and then
901        // checking that the number of nanoseconds matches the storage limit.
902        let duration = TimeDelta::milliseconds(i64::MAX);
903        assert!(duration.num_nanoseconds().is_none());
904        assert_eq!(
905            duration.secs as i128 * 1_000_000_000 + duration.nanos as i128,
906            i64::MAX as i128 * 1_000_000
907        );
908    }
909    #[test]
910    fn test_duration_nanoseconds_max_overflow() {
911        // This test establishes that a TimeDelta can store more nanoseconds than are
912        // representable through the return of duration.num_nanoseconds().
913        let duration = TimeDelta::nanoseconds(i64::MAX) + TimeDelta::nanoseconds(1);
914        assert!(duration.num_nanoseconds().is_none());
915        assert_eq!(
916            duration.secs as i128 * 1_000_000_000 + duration.nanos as i128,
917            i64::MAX as i128 + 1
918        );
919        // Here we ensure that trying to add one nanosecond to the maximum storable
920        // value will fail.
921        assert!(TimeDelta::milliseconds(i64::MAX)
922            .checked_add(&TimeDelta::nanoseconds(1))
923            .is_none());
924    }
925    #[test]
926    fn test_duration_nanoseconds_min_allowed() {
927        // The number of nanoseconds acceptable through the constructor is far fewer
928        // than the number that can actually be stored in a TimeDelta, so this is not
929        // a particular insightful test.
930        let duration = TimeDelta::nanoseconds(i64::MIN);
931        assert_eq!(duration.num_nanoseconds(), Some(i64::MIN));
932        assert_eq!(
933            duration.secs as i128 * 1_000_000_000 + duration.nanos as i128,
934            i64::MIN as i128
935        );
936        // Here we create a TimeDelta with the minimum possible number of nanoseconds
937        // by creating a TimeDelta with the minimum number of milliseconds and then
938        // checking that the number of nanoseconds matches the storage limit.
939        let duration = TimeDelta::milliseconds(-i64::MAX);
940        assert!(duration.num_nanoseconds().is_none());
941        assert_eq!(
942            duration.secs as i128 * 1_000_000_000 + duration.nanos as i128,
943            -i64::MAX as i128 * 1_000_000
944        );
945    }
946    #[test]
947    fn test_duration_nanoseconds_min_underflow() {
948        // This test establishes that a TimeDelta can store more nanoseconds than are
949        // representable through the return of duration.num_nanoseconds().
950        let duration = TimeDelta::nanoseconds(i64::MIN) - TimeDelta::nanoseconds(1);
951        assert!(duration.num_nanoseconds().is_none());
952        assert_eq!(
953            duration.secs as i128 * 1_000_000_000 + duration.nanos as i128,
954            i64::MIN as i128 - 1
955        );
956        // Here we ensure that trying to subtract one nanosecond from the minimum
957        // storable value will fail.
958        assert!(TimeDelta::milliseconds(-i64::MAX)
959            .checked_sub(&TimeDelta::nanoseconds(1))
960            .is_none());
961    }
962
963    #[test]
964    fn test_max() {
965        assert_eq!(
966            MAX.secs as i128 * 1_000_000_000 + MAX.nanos as i128,
967            i64::MAX as i128 * 1_000_000
968        );
969        assert_eq!(MAX, TimeDelta::milliseconds(i64::MAX));
970        assert_eq!(MAX.num_milliseconds(), i64::MAX);
971        assert_eq!(MAX.num_microseconds(), None);
972        assert_eq!(MAX.num_nanoseconds(), None);
973    }
974    #[test]
975    fn test_min() {
976        assert_eq!(
977            MIN.secs as i128 * 1_000_000_000 + MIN.nanos as i128,
978            -i64::MAX as i128 * 1_000_000
979        );
980        assert_eq!(MIN, TimeDelta::milliseconds(-i64::MAX));
981        assert_eq!(MIN.num_milliseconds(), -i64::MAX);
982        assert_eq!(MIN.num_microseconds(), None);
983        assert_eq!(MIN.num_nanoseconds(), None);
984    }
985
986    #[test]
987    fn test_duration_ord() {
988        assert!(TimeDelta::milliseconds(1) < TimeDelta::milliseconds(2));
989        assert!(TimeDelta::milliseconds(2) > TimeDelta::milliseconds(1));
990        assert!(TimeDelta::milliseconds(-1) > TimeDelta::milliseconds(-2));
991        assert!(TimeDelta::milliseconds(-2) < TimeDelta::milliseconds(-1));
992        assert!(TimeDelta::milliseconds(-1) < TimeDelta::milliseconds(1));
993        assert!(TimeDelta::milliseconds(1) > TimeDelta::milliseconds(-1));
994        assert!(TimeDelta::milliseconds(0) < TimeDelta::milliseconds(1));
995        assert!(TimeDelta::milliseconds(0) > TimeDelta::milliseconds(-1));
996        assert!(TimeDelta::milliseconds(1_001) < TimeDelta::milliseconds(1_002));
997        assert!(TimeDelta::milliseconds(-1_001) > TimeDelta::milliseconds(-1_002));
998        assert!(TimeDelta::nanoseconds(1_234_567_890) < TimeDelta::nanoseconds(1_234_567_891));
999        assert!(TimeDelta::nanoseconds(-1_234_567_890) > TimeDelta::nanoseconds(-1_234_567_891));
1000        assert!(TimeDelta::milliseconds(i64::MAX) > TimeDelta::milliseconds(i64::MAX - 1));
1001        assert!(TimeDelta::milliseconds(-i64::MAX) < TimeDelta::milliseconds(-i64::MAX + 1));
1002    }
1003
1004    #[test]
1005    fn test_duration_checked_ops() {
1006        assert_eq!(
1007            TimeDelta::milliseconds(i64::MAX).checked_add(&TimeDelta::milliseconds(0)),
1008            Some(TimeDelta::milliseconds(i64::MAX))
1009        );
1010        assert_eq!(
1011            TimeDelta::milliseconds(i64::MAX - 1).checked_add(&TimeDelta::microseconds(999)),
1012            Some(TimeDelta::milliseconds(i64::MAX - 2) + TimeDelta::microseconds(1999))
1013        );
1014        assert!(TimeDelta::milliseconds(i64::MAX)
1015            .checked_add(&TimeDelta::microseconds(1000))
1016            .is_none());
1017        assert!(TimeDelta::milliseconds(i64::MAX)
1018            .checked_add(&TimeDelta::nanoseconds(1))
1019            .is_none());
1020
1021        assert_eq!(
1022            TimeDelta::milliseconds(-i64::MAX).checked_sub(&TimeDelta::milliseconds(0)),
1023            Some(TimeDelta::milliseconds(-i64::MAX))
1024        );
1025        assert_eq!(
1026            TimeDelta::milliseconds(-i64::MAX + 1).checked_sub(&TimeDelta::microseconds(999)),
1027            Some(TimeDelta::milliseconds(-i64::MAX + 2) - TimeDelta::microseconds(1999))
1028        );
1029        assert!(TimeDelta::milliseconds(-i64::MAX)
1030            .checked_sub(&TimeDelta::milliseconds(1))
1031            .is_none());
1032        assert!(TimeDelta::milliseconds(-i64::MAX)
1033            .checked_sub(&TimeDelta::nanoseconds(1))
1034            .is_none());
1035    }
1036
1037    #[test]
1038    fn test_duration_abs() {
1039        assert_eq!(TimeDelta::milliseconds(1300).abs(), TimeDelta::milliseconds(1300));
1040        assert_eq!(TimeDelta::milliseconds(1000).abs(), TimeDelta::milliseconds(1000));
1041        assert_eq!(TimeDelta::milliseconds(300).abs(), TimeDelta::milliseconds(300));
1042        assert_eq!(TimeDelta::milliseconds(0).abs(), TimeDelta::milliseconds(0));
1043        assert_eq!(TimeDelta::milliseconds(-300).abs(), TimeDelta::milliseconds(300));
1044        assert_eq!(TimeDelta::milliseconds(-700).abs(), TimeDelta::milliseconds(700));
1045        assert_eq!(TimeDelta::milliseconds(-1000).abs(), TimeDelta::milliseconds(1000));
1046        assert_eq!(TimeDelta::milliseconds(-1300).abs(), TimeDelta::milliseconds(1300));
1047        assert_eq!(TimeDelta::milliseconds(-1700).abs(), TimeDelta::milliseconds(1700));
1048        assert_eq!(TimeDelta::milliseconds(-i64::MAX).abs(), TimeDelta::milliseconds(i64::MAX));
1049    }
1050
1051    #[test]
1052    #[allow(clippy::erasing_op)]
1053    fn test_duration_mul() {
1054        assert_eq!(TimeDelta::zero() * i32::MAX, TimeDelta::zero());
1055        assert_eq!(TimeDelta::zero() * i32::MIN, TimeDelta::zero());
1056        assert_eq!(TimeDelta::nanoseconds(1) * 0, TimeDelta::zero());
1057        assert_eq!(TimeDelta::nanoseconds(1) * 1, TimeDelta::nanoseconds(1));
1058        assert_eq!(TimeDelta::nanoseconds(1) * 1_000_000_000, TimeDelta::seconds(1));
1059        assert_eq!(TimeDelta::nanoseconds(1) * -1_000_000_000, -TimeDelta::seconds(1));
1060        assert_eq!(-TimeDelta::nanoseconds(1) * 1_000_000_000, -TimeDelta::seconds(1));
1061        assert_eq!(
1062            TimeDelta::nanoseconds(30) * 333_333_333,
1063            TimeDelta::seconds(10) - TimeDelta::nanoseconds(10)
1064        );
1065        assert_eq!(
1066            (TimeDelta::nanoseconds(1) + TimeDelta::seconds(1) + TimeDelta::days(1)) * 3,
1067            TimeDelta::nanoseconds(3) + TimeDelta::seconds(3) + TimeDelta::days(3)
1068        );
1069        assert_eq!(TimeDelta::milliseconds(1500) * -2, TimeDelta::seconds(-3));
1070        assert_eq!(TimeDelta::milliseconds(-1500) * 2, TimeDelta::seconds(-3));
1071    }
1072
1073    #[test]
1074    fn test_duration_div() {
1075        assert_eq!(TimeDelta::zero() / i32::MAX, TimeDelta::zero());
1076        assert_eq!(TimeDelta::zero() / i32::MIN, TimeDelta::zero());
1077        assert_eq!(TimeDelta::nanoseconds(123_456_789) / 1, TimeDelta::nanoseconds(123_456_789));
1078        assert_eq!(TimeDelta::nanoseconds(123_456_789) / -1, -TimeDelta::nanoseconds(123_456_789));
1079        assert_eq!(-TimeDelta::nanoseconds(123_456_789) / -1, TimeDelta::nanoseconds(123_456_789));
1080        assert_eq!(-TimeDelta::nanoseconds(123_456_789) / 1, -TimeDelta::nanoseconds(123_456_789));
1081        assert_eq!(TimeDelta::seconds(1) / 3, TimeDelta::nanoseconds(333_333_333));
1082        assert_eq!(TimeDelta::seconds(4) / 3, TimeDelta::nanoseconds(1_333_333_333));
1083        assert_eq!(TimeDelta::seconds(-1) / 2, TimeDelta::milliseconds(-500));
1084        assert_eq!(TimeDelta::seconds(1) / -2, TimeDelta::milliseconds(-500));
1085        assert_eq!(TimeDelta::seconds(-1) / -2, TimeDelta::milliseconds(500));
1086        assert_eq!(TimeDelta::seconds(-4) / 3, TimeDelta::nanoseconds(-1_333_333_333));
1087        assert_eq!(TimeDelta::seconds(-4) / -3, TimeDelta::nanoseconds(1_333_333_333));
1088    }
1089
1090    #[test]
1091    fn test_duration_sum() {
1092        let duration_list_1 = [TimeDelta::zero(), TimeDelta::seconds(1)];
1093        let sum_1: TimeDelta = duration_list_1.iter().sum();
1094        assert_eq!(sum_1, TimeDelta::seconds(1));
1095
1096        let duration_list_2 = [
1097            TimeDelta::zero(),
1098            TimeDelta::seconds(1),
1099            TimeDelta::seconds(6),
1100            TimeDelta::seconds(10),
1101        ];
1102        let sum_2: TimeDelta = duration_list_2.iter().sum();
1103        assert_eq!(sum_2, TimeDelta::seconds(17));
1104
1105        let duration_arr = [
1106            TimeDelta::zero(),
1107            TimeDelta::seconds(1),
1108            TimeDelta::seconds(6),
1109            TimeDelta::seconds(10),
1110        ];
1111        let sum_3: TimeDelta = duration_arr.into_iter().sum();
1112        assert_eq!(sum_3, TimeDelta::seconds(17));
1113    }
1114
1115    #[test]
1116    fn test_duration_fmt() {
1117        assert_eq!(TimeDelta::zero().to_string(), "P0D");
1118        assert_eq!(TimeDelta::days(42).to_string(), "PT3628800S");
1119        assert_eq!(TimeDelta::days(-42).to_string(), "-PT3628800S");
1120        assert_eq!(TimeDelta::seconds(42).to_string(), "PT42S");
1121        assert_eq!(TimeDelta::milliseconds(42).to_string(), "PT0.042S");
1122        assert_eq!(TimeDelta::microseconds(42).to_string(), "PT0.000042S");
1123        assert_eq!(TimeDelta::nanoseconds(42).to_string(), "PT0.000000042S");
1124        assert_eq!(
1125            (TimeDelta::days(7) + TimeDelta::milliseconds(6543)).to_string(),
1126            "PT604806.543S"
1127        );
1128        assert_eq!(TimeDelta::seconds(-86_401).to_string(), "-PT86401S");
1129        assert_eq!(TimeDelta::nanoseconds(-1).to_string(), "-PT0.000000001S");
1130
1131        // the format specifier should have no effect on `TimeDelta`
1132        assert_eq!(
1133            format!("{:30}", TimeDelta::days(1) + TimeDelta::milliseconds(2345)),
1134            "PT86402.345S"
1135        );
1136    }
1137
1138    #[test]
1139    fn test_to_std() {
1140        assert_eq!(TimeDelta::seconds(1).to_std(), Ok(Duration::new(1, 0)));
1141        assert_eq!(TimeDelta::seconds(86_401).to_std(), Ok(Duration::new(86_401, 0)));
1142        assert_eq!(TimeDelta::milliseconds(123).to_std(), Ok(Duration::new(0, 123_000_000)));
1143        assert_eq!(TimeDelta::milliseconds(123_765).to_std(), Ok(Duration::new(123, 765_000_000)));
1144        assert_eq!(TimeDelta::nanoseconds(777).to_std(), Ok(Duration::new(0, 777)));
1145        assert_eq!(MAX.to_std(), Ok(Duration::new(9_223_372_036_854_775, 807_000_000)));
1146        assert_eq!(TimeDelta::seconds(-1).to_std(), Err(OutOfRangeError(())));
1147        assert_eq!(TimeDelta::milliseconds(-1).to_std(), Err(OutOfRangeError(())));
1148    }
1149
1150    #[test]
1151    fn test_from_std() {
1152        assert_eq!(Ok(TimeDelta::seconds(1)), TimeDelta::from_std(Duration::new(1, 0)));
1153        assert_eq!(Ok(TimeDelta::seconds(86_401)), TimeDelta::from_std(Duration::new(86_401, 0)));
1154        assert_eq!(
1155            Ok(TimeDelta::milliseconds(123)),
1156            TimeDelta::from_std(Duration::new(0, 123_000_000))
1157        );
1158        assert_eq!(
1159            Ok(TimeDelta::milliseconds(123_765)),
1160            TimeDelta::from_std(Duration::new(123, 765_000_000))
1161        );
1162        assert_eq!(Ok(TimeDelta::nanoseconds(777)), TimeDelta::from_std(Duration::new(0, 777)));
1163        assert_eq!(Ok(MAX), TimeDelta::from_std(Duration::new(9_223_372_036_854_775, 807_000_000)));
1164        assert_eq!(
1165            TimeDelta::from_std(Duration::new(9_223_372_036_854_776, 0)),
1166            Err(OutOfRangeError(()))
1167        );
1168        assert_eq!(
1169            TimeDelta::from_std(Duration::new(9_223_372_036_854_775, 807_000_001)),
1170            Err(OutOfRangeError(()))
1171        );
1172    }
1173
1174    #[test]
1175    fn test_duration_const() {
1176        const ONE_WEEK: TimeDelta = TimeDelta::weeks(1);
1177        const ONE_DAY: TimeDelta = TimeDelta::days(1);
1178        const ONE_HOUR: TimeDelta = TimeDelta::hours(1);
1179        const ONE_MINUTE: TimeDelta = TimeDelta::minutes(1);
1180        const ONE_SECOND: TimeDelta = TimeDelta::seconds(1);
1181        const ONE_MILLI: TimeDelta = TimeDelta::milliseconds(1);
1182        const ONE_MICRO: TimeDelta = TimeDelta::microseconds(1);
1183        const ONE_NANO: TimeDelta = TimeDelta::nanoseconds(1);
1184        let combo: TimeDelta = ONE_WEEK
1185            + ONE_DAY
1186            + ONE_HOUR
1187            + ONE_MINUTE
1188            + ONE_SECOND
1189            + ONE_MILLI
1190            + ONE_MICRO
1191            + ONE_NANO;
1192
1193        assert!(ONE_WEEK != TimeDelta::zero());
1194        assert!(ONE_DAY != TimeDelta::zero());
1195        assert!(ONE_HOUR != TimeDelta::zero());
1196        assert!(ONE_MINUTE != TimeDelta::zero());
1197        assert!(ONE_SECOND != TimeDelta::zero());
1198        assert!(ONE_MILLI != TimeDelta::zero());
1199        assert!(ONE_MICRO != TimeDelta::zero());
1200        assert!(ONE_NANO != TimeDelta::zero());
1201        assert_eq!(
1202            combo,
1203            TimeDelta::seconds(86400 * 7 + 86400 + 3600 + 60 + 1)
1204                + TimeDelta::nanoseconds(1 + 1_000 + 1_000_000)
1205        );
1206    }
1207
1208    #[test]
1209    #[cfg(feature = "rkyv-validation")]
1210    fn test_rkyv_validation() {
1211        let duration = TimeDelta::seconds(1);
1212        let bytes = rkyv::to_bytes::<_, 16>(&duration).unwrap();
1213        assert_eq!(rkyv::from_bytes::<TimeDelta>(&bytes).unwrap(), duration);
1214    }
1215}
chrono/time_delta.rs

chrono/
time_delta.rs
